Weight loss isn't always an easy feat — but stars who've shed pounds with Jenny Craig make it look effortless!

After her appearance was criticized by the media, Mariah Carey used the diet and exercise program to lose weight after giving birth to her twins back in 2011.

MORE: Melissa McCarthy Weight Loss — See Her Show off Her Slim New Figure!

"If they want to rag at me for looking like a huge boat, like that wasn’t my fault, I couldn’t help it," the celebrity once said. "Carrying two human lives inside me and doing the best I could. What am I going to do?”

The singer lost 30 pounds and was able to get her enviable figure back. Looks like Jenny Craig really does work!

Watch the video below to see more stars who now flaunt slimmer figures thanks to Jenny Crag!